Search for scalar bottom quarks from gluino decays in proton -antiproton collisions at a center-of-mass energy of 1.96 TeV

We have performed a search for the scalar bottom quark ([special characters omitted]) from gluino ([special characters omitted]) decays in an R-parity conserving SUSY scenario with [special characters omitted], by investigating a final state of large missing transverse energy, with three or more jets, and some of them from the hadronization of b-quarks. A data sample of 156 pb−1 collected by the Collider Detector at Fermilab at a center-of-mass energy of [special characters omitted] = 1.96 TeV was used. For the final selection, jets containing secondary displaced vertices were required. This analysis has been performed ‘blind’, in that the inspection of the signal region was only made after the Standard Model prediction was finalized. Comparing data with SUSY predictions, we can exclude masses of the gluino and sbottom of up to 280 and 240 GeV/ c2 respectively